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-   -   Cloning a Time Machine Disk (https://www.shirt-pocket.com/forums/showthread.php?t=6156)

stuppy 04-05-2010 02:48 PM

Cloning a Time Machine Disk
 
Hi

I want to clone my time machine back up disk for extra redundancy. I tried setting this up and it seemed to be working but i soon realised that the two 1TB hard drives I am using had varying amounts of free space....

I.e. the Time Machine disk would have 20GB free, while the clone of the TM disk would have 30GB - where one would assume that using a Smart Update, the drives should be using pretty much the same amount of space.

Is there a reason for this and is there a way to get identical drives using SD?

Thanks.

dnanian 04-05-2010 02:58 PM

It's probably just because the spotlight index isn't copied... it's preserved on the destination and it'll regenerate.

stuppy 04-06-2010 04:12 PM

Quote:

Originally Posted by dnanian (Post 29080)
It's probably just because the spotlight index isn't copied... it's preserved on the destination and it'll regenerate.

Hi

Sorry I don't follow. The free space on both 1TB hard drives was completely different. If SD is doing a Smart Update to make the Time Machine Backup the same as the Time Machine disk, surely the amount of space used would be the same?

dnanian 04-06-2010 06:40 PM

Not necessarily, no. The spotlight index isn't copied... it's regenerated on the destination.

stuppy 04-15-2010 04:18 PM

Okay,

When I did have it set up though - the mirror of my Time Machine disk ran out of space so the backup failed. Since the time machine drive is full, Super Duper didn't seem to delete the files or update Spotlight or whatever and used more space than the TM drive.

dnanian 04-15-2010 06:51 PM

That can happen depending on what's changed on the Time Machine drive. It's very complicated to Smart Update something that complex if there's no free space.


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